It is crazy but it’s also quite true. People eschew true adult responsibility for much longer these days. It’s a macro trend.
I know there’s a lot of “whys” but not getting married, not having kids, living with parents, etc all compound to remaining a child in some sense and this is continuing well into the 20s and even 30s for a large portion of the demographic.
When it comes to 19 y/o women the fact most internet people would find it gross that 1) highly fertile and 2) desired by old men - is a reality. We tell old men these women are too young yet also won’t admit it’s because they are in some sense still children.